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What are the side-effects of Collagen Peptide? The most commonly reported side-effects of Collagen Peptide are nausea, pruritus, exanthema, gastrointestinal symptoms, and headache. The following is a list of possible side effects that may occur from the use of Collagen Peptide. This is not a comprehensive list. These side-effects are possible, but do not always occur. Some of the side-effects may be rare but serious. Consult your doctor if you observe any of the following side-effects, especially if they do not go away.
1) Skin Health. Some studies have found that collagen peptides can improve skin elasticity. In a 2014 study in Skin Pharmacology and Physiology, for instance, women aged 35 to 55 years took collagen supplements or a placebo once daily for eight weeks.